CN101254485A - Development method of microvesicle generators and applications thereof - Google Patents
Development method of microvesicle generators and applications thereof Download PDFInfo
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- CN101254485A CN101254485A CNA2007100664500A CN200710066450A CN101254485A CN 101254485 A CN101254485 A CN 101254485A CN A2007100664500 A CNA2007100664500 A CN A2007100664500A CN 200710066450 A CN200710066450 A CN 200710066450A CN 101254485 A CN101254485 A CN 101254485A
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- 238000011161 development Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 12
- 238000013461 design Methods 0.000 claims abstract description 19
- 238000002474 experimental method Methods 0.000 claims abstract description 13
- 238000004088 simulation Methods 0.000 claims abstract 3
- 238000013316 zoning Methods 0.000 claims description 23
- 238000013459 approach Methods 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000011960 computer-aided design Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000000205 computational method Methods 0.000 claims 1
- 238000010008 shearing Methods 0.000 claims 1
- 238000007794 visualization technique Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 238000005188 flotation Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005457 optimization Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000008247 solid mixture Substances 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002761 deinking Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- -1 papermaking Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Abstract
The invention discloses a method for developing a microbubble generator and the application thereof. The method includes the following steps: (1) designing the structure of the microbubble generator by using the CAD software; (2) establishing a finite volume computation model of the microbubble generator, and performing grid division of the model and setting boundary conditions of computation regions; (3) performing numerical computation of the computation regions of the model by using CFD software equation solver; (4) calculating parameters such as velocity field, pressure field and turbulent energy distribution; (5) correcting structural dimensions of the microbubble generator and analyzing various work conditions of the microbubble generator; and (6) manufacturing a physical prototype of the microbubble generator, carrying out physical experiments to verify the correctness of the method. The method can reduce the development cost, improve the design reliability, shorten the development period, and integrate computer-based numerical simulation and physical experiment. The inventive method is also used for the development of other fluid mechanisms.
Description
Technical field
The present invention relates to microfoam flotation technical field in the mineral processing, be specifically related to a kind of development approach and application of microbubble generator.
Background technology
Microvesicle generators is the important device that produces microvesicle, is the critical component in the microfoam flotation system.In microfoam flotation, one of its important key technology is how to obtain size, quantity, distribution, the rational microvesicle of flow pattern, the quality of microvesicle generators performance is very big to flotation effect, the flotation rate influence of whole flotation unit, in addition, the obstruction of microvesicle generators also is the bottleneck of restriction microfoam flotation technical development always.These and microvesicle generators flow field characteristic have direct relation.At present, mainly employing experience of microvesicle generators design and Physical Experiment means design, and exist to manufacture and design long, shortcoming such as processing cost is high, testing method is loaded down with trivial details of cycle, and are both uneconomical also unreasonable, the demand for development of incompatibility microbubble generator.Along with the ripe gradually of computer hydrodynamics (Computational Fluid Dynamics, be called for short CFD) research with develop rapidly, be expected to the CFD technology is applied in design, analysis and the structure optimization of microvesicle generators.At present rare about design has the research of actual directive significance to publish to microvesicle generators.
Summary of the invention
The development approach that the purpose of this invention is to provide a kind of microvesicle generators, its collection computer numerical emulation and Physical Experiment are one, the microvesicle generators of development and Design can produce microvesicle effectively, can effectively improve designing quality, reduce development cost, shorten the construction cycle, and can prevent the obstruction of microvesicle generators, possess good flow field characteristic.
The development approach that the present invention proposes has been applied in design, analysis and the structure optimization of microvesicle generators, the microvesicle generators of development and Design can be used for multiple fields such as metal or non-metal mine, coal, papermaking, deinking, Industrial Wastewater Treatment, and this method also can be used for designing and developing of other hydraulic mechanism.
Microvesicle generators provided by the present invention is designed and developed method, and mentality of designing is as follows:
Adopt CAD (CAD) technology to carry out structural design, and utilize the visual advantage of business computer hydrodynamics software CFD technology, determine the position in negative pressure of vacuum district in the microvesicle generators, distribution situation, air, water, the VELOCITY DISTRIBUTION of each phase of mineral and the suitable jet expansion speed of turbulent fluctuation energy, analyze nozzle position the most easy to wear.Simultaneously microvesicle generators is carried out the multi-state analysis, determine the optimum structure parameter of microvesicle generators, the performance of prediction microvesicle generators.And, carry out Physical Experiment according to the microvesicle generators structural parameters making physical prototyping that CFD technical Analysis result determines, the correctness of checking development approach reaches the purpose that manufactures and designs the high-quality microvesicle generators fast.
Microvesicle generators provided by the present invention is designed and developed method, and step is as follows:
(1) utilizes computer aided design cad software that microvesicle generators is carried out preliminary structural design, determine microvesicle generators each several part physical dimension;
(2) set up the limited bulk computation model of microvesicle generators, model is carried out the boundary condition that the zoning was divided and set to grid;
(3) use commercial CFD software solver microvesicle generators zoning model is carried out numerical computations;
(4) calculate parameters such as velocity field, pressure field and turbulent fluctuation can distribute, determine negative pressure of vacuum position and the easily-worn position of nozzle in the zoning;
(5) revise the microvesicle generators physical dimension, microvesicle generators is carried out the multi-state analysis, each physical dimension of analyzing influence microvesicle generators is to the influence of microvesicle generators flow field characteristic, and the optimum structure size of definite microvesicle generators;
(6) microvesicle generators of determining optimum structure size is carried out the making of physical prototyping, and carry out Physical Experiment, the correctness of checking development approach.
The invention has the beneficial effects as follows
The present invention adopts by commercial CFD art designs microvesicle generators, for all having played crucial effect in aspects such as reducing design cost, shortening construction cycle and raising ability to develop independently, the present invention adopts virtual design, can pinpoint the problems as early as possible, carry out structural modification, can finish the simulated experiment of various operating modes fast, obtain and the corresponding to important referential data of actual condition, can conveniently carry out the various hydrodynamics experiments of multiphase flow, to obtain the quick exploitation of high-quality microvesicle generators, vast potential for future development is arranged.
Description of drawings
Fig. 1 is the jetting type microvesicle generators zoning figure that the present invention adopts.
Fig. 2 is the jet microvesicle generators model meshes division figure that the present invention adopts.
Fig. 3 is the gas phase velocity cloud charts of zoning of the present invention.
Fig. 4 is the hydrostatic pressure distribution isogram of zoning of the present invention.
Fig. 5 is the turbulent fluctuation of the zoning of the present invention isogram that can distribute.
Fig. 6 is the scheme of installation of the Physical Experiment embodiment that adopts of the present invention.
Fig. 7 is that the jet microvesicle generators that the present invention adopts is tested the microvesicle picture that produces diameter 0.1-0.3mm.
The specific embodiment
Below in conjunction with accompanying drawing, exemplary embodiments of the present invention is described in further detail, following examples are used to illustrate the present invention.
The method that the inventive method adopts CAD software, CFD software and experiment to combine is developed design to microvesicle generators, its principle of the microvesicle generators that the present invention relates to is to utilize respectively to account for a certain proportion of air, water, mineral intermixture by fluid turbulent fluctuation diffusion, produce even, small bubble, to adapt to the needs of microfoam flotation.In the microvesicle generators of design, air-flow is fractured into microvesicle, and can solve the easy blocking problem of microbubble generator effectively.Consulting accompanying drawing below is that example specifies with the jet microvesicle generators.
Fig. 1 is the zoning figure of embodiment, as shown in Figure 1, adopts CAD software to draw, and the each several part zone name is as follows: 1-nozzle, 2-air intake duct, 3-mixing chamber, 4-trunnion, 5-anemostat.
Nozzle, mixing chamber, trunnion, anemostat are on same center line, and air inlet pipe is vertically mounted on induction chamber air inlet place.Its operation principle is that the ore pulp pump is sent liquid, solid mixture that certain proportion mixes into nozzle 1, the contraction of depending nozzle inner section makes liquid, solid mixture quicken ejection, and form certain vacuum, air by air intake duct 2 entrainmented into, and gas-liquid-solid three-phase is mixed strongly in mixing chamber 3, air is cut into micro-bubble, in trunnion 4, form foam stream, and send into flotation column from anemostat 5.
Fig. 2 is the grid division figure of embodiment, as shown in Figure 2, adopts CAD software to realize the Geometric Modeling of zoning, and the zoning comprises nozzle, air intake duct, mixing chamber, trunnion and anemostat.Adopt the pre-processing software GAMBIT of commercial CFD that the grid division is carried out in whole zoning, adopt quadrilateral mesh, quadrilateral mesh calculates convergence easily, and to the jet expansion mesh refinement.The entrance boundary is respectively speed entrance boundary condition and pressure entrance boundary condition, specifically is the boundary condition of nozzle inner walls face and air pressure inlet; The outlet border is the pressure export boundary condition, it specifically is the boundary condition of gas-liquid-solid three-phase mixture pressure outlet, the nozzle entrance speed 3m/s of ore pulp speed porch in the present embodiment, it is the high water column of 1.5m that pressure export adopts the flotation column back pressure, be 0.015MPa, pressure entrance is made as: relative pressure 0MPa.
Fig. 3 adopts the gas phase velocity cloud charts of embodiment for the present invention, the flow speed value of this color representative of left side numeric representation among the figure, and unit is m/s.As seen from Figure 3, show clearly in the flow field, the gas phase maximal rate occurs near the jet hole, can see the strong effect of entrainmenting at the air inlet place, this mainly is because the effect of negative pressure of vacuum is involved in mixing chamber with air, also can see the strong immixture of mixing chamber and trunnion connection place simultaneously.
Fig. 4 adopts the static pressure distribution isogram of embodiment for the present invention, the force value of Y-axis representative among the figure, and unit is Pa, and X-axis is represented the position of zoning, and unit is mm.Can see that by Fig. 4 static pressure is very high in nozzle, and numerical value about equally, but reduce suddenly, and minimum static pressure appears near the jet expansion at nozzle exit pressure.Static pressure the second time peak value in the connection place of mixing chamber and trunnion.
Fig. 5 adopts the turbulent fluctuation of the embodiment isogram that can distribute for the present invention, and Y-axis is represented the turbulent fluctuation energy among the figure, and unit is m
2/ s
2, X-axis is represented the position of zoning, and unit is mm.Twice turbulent fluctuation energy peak value appears in whole zoning as seen from Figure 5, occur in for the first time the connection place of mixing chamber and trunnion, occur in for the second time anemostat portion on the upper side, peak value is caused by strong mixing, the mass transfer of gas, liquid, solid three-phase for the first time, and the back pressure by the anemostat exit causes for the second time.Understand the distribution of turbulent fluctuation energy and can well predict the foam performance of microvesicle generators, and then optimized the structure of microvesicle generators.
Fig. 6 as shown in Figure 6, mainly comprises working barrel, flowmeter, Pressure gauge, microvesicle generators, vacuum meter, flotation cylinder and concentrate feeder composition for the physics installation diagram that the present invention adopts embodiment.
The microvesicle image that Fig. 7 produces for embodiment of the invention Physical Experiment.The microvesicle diameter is between 0.1～0.3, and the development approach that microvesicle generators is described is effective.Adopt nozzle entrance speed to be in the present embodiment: 3m/s, pressure export adopt the flotation column back pressure to be: the high water column of 1.5m, i.e. and 0.015MPa, pressure entrance is: relative pressure 0MPa.
In whole development process, to carry out the multi-state analysis to microvesicle generators, mainly comprise the change of change, mixing chamber structure, throat pipe diameter and the length of nozzle arrangements parameter, air inlet diameter, the change of anemostat tapering and the change of operating parameter, as the mixed proportion of nozzle entrance speed, gas, liquid, solid three-phase with change self-priming and be air feed initiatively.And according to the multi-state analysis result, reasonable combination is optimized the design of microvesicle generators, and carries out structural design again, instructs the making of physical prototyping, reaches the purpose of optimization.
Claims (6)
1. the development approach of a microvesicle generators, its step is as follows:
(1) utilizes computer aided design cad software that microvesicle generators is carried out preliminary structural design, determine microvesicle generators each several part physical dimension;
(2) set up the limited bulk computation model of microvesicle generators, and model is carried out the boundary condition of grid division and setting zoning;
(3) use commercial CFD software solver microvesicle generators zoning model is carried out numerical computations;
(4) calculate parameters such as velocity field, pressure field and turbulent fluctuation can distribute, determine negative pressure of vacuum position and the easily-worn position of nozzle in the zoning;
(5) revise the microvesicle generators physical dimension, and microvesicle generators is carried out the multi-state analysis, each physical dimension of analyzing influence microvesicle generators is to the influence of microvesicle generators flow field characteristic, and the optimum structure size of definite microvesicle generators;
(6) microvesicle generators of determining optimum structure size is carried out the making of physical prototyping, and carry out Physical Experiment, the correctness of checking development approach.
2. microvesicle generators development approach according to claim 1, it is characterized in that: described step (2) is used the Geometric Modeling that CAD software is realized the zoning, the zoning comprises nozzle, air intake duct, mixing chamber, trunnion and anemostat, with pre-processing software GAMBIT software grid being carried out in whole zoning divides, adopt quadrilateral mesh, inlet is speed and pressure boundary condition, exports to be the pressure export boundary condition.
3. microvesicle generators development approach according to claim 1, it is characterized in that: described step (3) is used commercial CFD software numerical simulation is carried out in whole zoning, the zoning comprises nozzle, air intake duct, mixing chamber, trunnion and anemostat, the turbulence model of selecting for use is the companied with k-s model, computational methods adopt permanent non-coupling implicit algorithm, pressure term adopts the second order upstreame scheme, and the pressure-speed coupling adopts the SIMPLEC algorithm.
4. microvesicle generators development approach according to claim 1, it is characterized in that: described step (4) is based on CFD technology numerical simulation result, obtain velocity field, pressure field and turbulent fluctuation can distribute, and determine the shearing force of zoning vacuum and nozzle limit wall by the visualization technique of CFD.
5. microvesicle generators development approach according to claim 1 is characterized in that: physical dimension and boundary condition that described step (5) changes microvesicle generators, microvesicle generators is carried out the multi-state analysis, and determine the microvesicle generators optimum structure.
6. microvesicle generators development approach according to claim 1 is characterized in that: described step (6) is made physical prototyping and is carried out Physical Experiment, and collection CAD and computer numerical emulation are one, the validity of checking development approach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100664500A CN101254485B (en) | 2007-12-13 | 2007-12-13 | Development method of microvesicle generators |
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| CN2007100664500A CN101254485B (en) | 2007-12-13 | 2007-12-13 | Development method of microvesicle generators |
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| CN101254485A true CN101254485A (en) | 2008-09-03 |
| CN101254485B CN101254485B (en) | 2011-02-16 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916318A (en) * | 2010-08-27 | 2010-12-15 | 镇江科大船苑计算机网络工程有限公司 | Scale value outline overstriking drawing method of sign plate |
| CN103871308A (en) * | 2014-03-25 | 2014-06-18 | 中国矿业大学(北京) | Teaching experiment platform for flotation bubble mineralization process |
| CN104897437A (en) * | 2015-06-01 | 2015-09-09 | 金川集团股份有限公司 | Automatic sampling device and method for nelson effluent concentrate |
| CN106268544A (en) * | 2016-08-05 | 2017-01-04 | 南京大学 | Tower ultra-fine bubble reactor |
| CN106629955A (en) * | 2016-10-26 | 2017-05-10 | 北京石油化工学院 | Novel micro-bubble generator for air-flotation treatment of water extracted from oil field and analysis method thereof |
| CN111946866A (en) * | 2020-07-31 | 2020-11-17 | 宁波川渡流体科技有限公司 | Water-gas mixing balance valve and micro-bubble water system formed by same |
| CN112359626A (en) * | 2020-11-13 | 2021-02-12 | 郑州磊展科技造纸机械有限公司 | Pulp-feeding non-blocking jet flow distributor for flotation deinking machine |
| CN112934482A (en) * | 2021-03-16 | 2021-06-11 | 中国恩菲工程技术有限公司 | Flotation method and flotation device |
| CN113952879A (en) * | 2021-06-11 | 2022-01-21 | 天津市艾盟科技发展有限公司 | Powder material jet flow feeding device with high solid-liquid volume flow ratio and high dispersion pressure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2279216Y (en) * | 1996-10-16 | 1998-04-22 | 中国矿业大学 | Column flotator energy-saving microfoam generator |
| KR100739922B1 (en) * | 2000-06-23 | 2007-07-16 | 이순화 | Fine air bubble generator and fine air bubble generating device with the generator |
-
2007
- 2007-12-13 CN CN2007100664500A patent/CN101254485B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916318A (en) * | 2010-08-27 | 2010-12-15 | 镇江科大船苑计算机网络工程有限公司 | Scale value outline overstriking drawing method of sign plate |
| CN103871308A (en) * | 2014-03-25 | 2014-06-18 | 中国矿业大学(北京) | Teaching experiment platform for flotation bubble mineralization process |
| CN104897437A (en) * | 2015-06-01 | 2015-09-09 | 金川集团股份有限公司 | Automatic sampling device and method for nelson effluent concentrate |
| CN106268544A (en) * | 2016-08-05 | 2017-01-04 | 南京大学 | Tower ultra-fine bubble reactor |
| CN106268544B (en) * | 2016-08-05 | 2020-03-24 | 南京大学 | Tower type superfine bubble reactor |
| CN106629955A (en) * | 2016-10-26 | 2017-05-10 | 北京石油化工学院 | Novel micro-bubble generator for air-flotation treatment of water extracted from oil field and analysis method thereof |
| CN111946866A (en) * | 2020-07-31 | 2020-11-17 | 宁波川渡流体科技有限公司 | Water-gas mixing balance valve and micro-bubble water system formed by same |
| CN111946866B (en) * | 2020-07-31 | 2022-03-11 | 宁波川渡流体科技有限公司 | Water-gas mixing balance valve and micro-bubble water system formed by same |
| CN112359626A (en) * | 2020-11-13 | 2021-02-12 | 郑州磊展科技造纸机械有限公司 | Pulp-feeding non-blocking jet flow distributor for flotation deinking machine |
| CN112934482A (en) * | 2021-03-16 | 2021-06-11 | 中国恩菲工程技术有限公司 | Flotation method and flotation device |
| CN113952879A (en) * | 2021-06-11 | 2022-01-21 | 天津市艾盟科技发展有限公司 | Powder material jet flow feeding device with high solid-liquid volume flow ratio and high dispersion pressure |
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